Make: Online reader Richard Kline (Dayton, OH) wrote in to remind us of this excellent ham radio convention:

I thought I would send a heads-up in case nobody else had about Hamvention 2010, a huge electronics and ham radio convention in Dayton Ohio, which takes place in about two weeks (May 14, 15, and 16th).

Hamvention usually has attendance of about 20,000 people and is loads of fun for anyone who is interested in electronics or ham radio… there is an outdoor electronics flea market with thousands of vendors selling all variety of electronic tools and components and a myriad more ham-radio vendors indoors showing off their latest and greatest stuff. Tickets are $20 in advance and $25 at the door and are good for all three days. Outdoor flea market vendor spaces costs between $70 and $100 depending on location.